Your in the same boat as me and I still dont know what to do, not even got the damn car yet but still pondering on what to do. Everyones telling me I have 2 options for modding the induction, 1 being just get a replacement panel filter which may give extra 2-3bhp with better throttle response but no change in induction noise, 2nd being to ONLY get a sealed box induction kit such as a BMC CDA (approx £175)or Pipercross Viper (£246) which can give between 7-10bhp in theory but may require fuelling checking to see if its not running too lean (I think) both will be noisier with the BMC loudest.
I just dont know if I want to spend that ammount of £ on a air filter and not sure also if the warranty would be void, also the hastle of removing it before it ever went to dealer for service or warranty work once fitted, still cant decide whether its worth the hastle or money
My main thing is I WANT SOME ROAR & NOISE ON THROTTLE
I do know k-tecracing.com and hillpower.co.uk are currently working on some new kits